The blackroll block is a multipurpose tool wich has an open flipside in which you can practically store your blackroll mini or blackroll duoball ball use as self myofascial release tool the blackroll block serves as a higher deck for pinpoint massage using a blackroll duoball or blackroll ball 8 cm or blackroll mini calvesachilles targeting muscle groups that are otherwise hard to reach functional training tool use as a yoga block for extension support and easier ba